Pick attachment for dredgers



(No Model.)

H.SPOTTBR. PICK ATTACHMENT FOR DBBDGERS.

V1\I0.`576,2`72. Patented Jn. 12, 1897.

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'ilNiTnn STnTigs PATENT Tribu.

HORACE S. POTTER, OF JERSEY CITY, NEY JERSEY.

PICK ATTACHMENT FOR DREDGERS.

SPECIFICATION forming part of Letters Patent No. 575,272, dated January 12, 1897.

.Application filed April 25, 1896. Serial No. 589,067. (No modelJ T0 @ZZ whom it may concern:

Be it known that I, HORACE S. POTTER, of Jersey City, in the county of Hudson and State of New Jersey, have invented a new and useful Improvement in Pick Attachments for Dredgers, of which the following is a full, clear, and exact description.V Y

The object of my invention is to provide a pick adapted for attachment to a dredger and capable of being worked from-a point inboard on the dredger, the said pick being capable of a vertical and likewise of a lateral movement, and is adapted to enter a bank adjacent to the excavation when the soilV is such that the buckets of the dredger cannot take it up from the side portions of the excavation.

A further object of the invention is to so construct the pick that when its shank or handle is drawn upward the pick will be drawn downward and in direction of the excavation to such an extent as to carry from the bank a large amount of soil, depositing it in the excavation, so that the said loosened soil may be readily taken up by the buckets of the dredger.

Another object of the invention is to con struct the pick attachment in such manner that when not in use it may be folded up out of the way of all of the working parts of the dredger, the pick being adaptable to any form of dredger, but it is particularly adapted for attachment to that class known as clamshell-bucket dredgers.

The invention consists in the novel construction and combination of the several parts, as will be hereinafter fully set forth, and pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure l is a partial side elevation of the dredger and a side elevation of a pick applied to the dredger, the pick being shown in operation. Fig. 2 is a plan view of the turn-table to which the heel portion of the pick handle or shank is attached, and Fig. 3 is a plan view of the head in which the picks are located.

In carrying out the invention the pick 10 may be of any desired size or of any approved shape, and its handle or shank A is made in sections, preferably two sections 11 and 12,

the said sections being connected by a hinge 13, located at the under side of the sections, and this hinge is ordinarily of the rule type. The inner or heel end of the inner section 12 of the handle or shank of the pick is pivoted to a turn-table 14 and the turn-table`is pivotally secured within a hanger 15, secured, preferably, to the forward portion of the body of the dredger at a point near its bottom, and if in practice it is found desirable these hangers 15 may be placed at different points on the dredger, so that the pick may be operated from the sides as well as at the front. Under this construction the pick will have lateral movement, owing to the pivotal movement in the same direction of the turn-table, and the pick will also have vertical movement due to the manner in which its handle or shank is pivoted to the turntable, and owing to the hinge connection between the sections of the shank or handle the two sections may be folded parallel to each other and both parallel with a side of the body of the dredger, as shown in dotted lines in Fig. 1, and as the outer section 11 of the shank or handle is the longer the pick will extend below the body of the dredger out of the way.

One or more picks may bc used, and preferably, as shown in Fig. 3, a head C is secured to an outer section 11 of the handle or shank A, and this head is provided with a series of grooves o. A pick lO may be placed in each of these grooves, and the picks are held firmly in the head by means of straps C', which are secured to the end portions of the head and are preferably made to enter recesses made transversely in the outer faces of the picks, so that the front of the picks will be perfectly smooth.

I desire it to be understood that an adz or an equivalent tool may be substituted for the picks if the character of the work should re quire the use of such a tool.

The dredger B may be of any suitable or approved construction. At any desired point on or within the dredger two drums 16 and 17 are mounted, and preferably the drum 16 is smaller than the drum 17. A rope, chain, or cable 18 is secured to the drum 16 and is carried upward over l a pulley 19, which is pendent from the top of the mast 20, and the said rope or cable 1S is then carried down- IOO ward and attached to the upper edge of the inner section 12 of the pick handle or shank, preferably adjacent to its hinged connection with the outer section 11.

A second rope, chain, or cable 21 is secured to the drum 17, and this latter chain or cable is carried upward over the pulley 19 or an adjacent pulley, and thence over a pulley 22, located in the outer end of the boom 2S, and the second chain, rope, or cable 21 is attached to the outer shank or handle section 11 of the pick, close to said pick, as shown in Fig. 1. The piek being in the folded position shown in dotted lines in Fig. 1, and the character of the ground requiring that it shall be loosened before it can be taken up by the dredger, the cable 21 is wound upon its drum 17 until the two sections of the handle are straightened out and brought end to end. Then by loosening both of the cables 18 and 2l the piek will drop and enter the ground at a point adjacent to' a wall of the excavation, as shown in positive lines in Fig. 1. The pick having been seated, the cable 21 remains slack while the eable 18 is wound up upon its drum 16, thereby drawing upward the sections of the handle or shank and placing said sections at angles to one another, causing the pick to take a downward and an inward direction and break away the earth between it and the excavation, depositing the said broken section of earth into the said excavation. By continuing the upward movement of the handle-sections of the piek the pick and its handle may be folded up out of the way, so as to give the buckets of the dredger an opportunity to work in the usual manner.

It will be understood that the handle-scction of the pick may be telescopic, or that other devices may be employed for manipulating the pick by giving it lateral or lateral and vertical motion from the dredge, the handle not necessarily beinghinged or in sections.

Having thus described my invention, I claim as new and desire to secure by Letters Patent-- 1. A pick arranged for attachment to a dredger and having its handle or shank in pivotally-eonnected sections, the sections being adapted to break in one direction, as and for the purpose specified.

2. A pick adapted for attachment to dredgers and like machines, provided with a handle or shank constructed in sections, the sections being connected by a hinge the knuckle whereof extends below one of the faces of the said sections, as and for the purpose specified.

3. A pick adapted for attachment to a dredger or like machine, and a handle attached to the pick, constructed in two sections, the sections being connected by a hinge, the section of the handle attached directly to the pick being longer than the other section, as and for the purpose speciiied.

4f. The combination, with a dredger and a turn-table connected therewith, of a pick, a handle attached to the pick and constructed in hinge-connected sections, one of the scctions being connected with the turn-table, a hoisting device connected with the handle near the pick, and a second device of like character connected with the handle adjacent to the hinge connection of the sections, as and for the purpose specified.

5. The combination, with a dredger and a turn-table connected therewith, of a pick, a handle attached to the pick, constructed in sections, the sections having ahinge connection and the hinge being located at the under side of the handle, and hoisting devices connected one with the handle near the hinge and the other with the handle adjacent tothe pick, as and for the purpose set forth.

6. In a dredging device, the combination, with a turn-table, of a pick, a handle connected with the pick and constructed in hinged sections, the inner section having a pivotal engagement with the turn-table, be ing capable of moving in a vertical direction, and hoisting devices connected one with the piek and the other with the handle adjacent to its hinge, as and for the purpose specified.

HORACE S. POTTER.

Vitnesses:

FRANK POTTER, JOSEPH M. POTTER. 

